Physicists vow to cut the cord between your laptop battery and the wall socketwith just a simple loop of wire...
And perhaps one day they will...
Researchers have successfully lit a 60-watt light bulb by transferring energy through the air from one specially designed copper coil to the bulb, which was attached to a second coil seven feet away
http://www.sciam.com/article.cfm?articleid=07511C52-E7F2-99DF-3FA6ED2D7DC9AA20&chanId=sa025
http://news.bbc.co.uk/1/hi/technology/6725955.stm
That's pretty cool and one day we might be able to do away with this: